Oriented silicon steel capable of improving coating adhesion performance and preparation method thereof

The invention provides oriented silicon steel capable of remarkably improving the coating adhesion performance. The oriented silicon steel comprises, by weight, 0.015%-0.095% of C, 2.80%-3.60% of Si,0.020%-0.035% of Als, 0.0050-0.0100% of N, 0.010%-1.00% of Mn and 0.0030%-0.03% of S. The preparation method includes the steps that casting is conducted to form billet after smelting is finished; low-temperature or high-temperature hot rolling is conducted; coiling is conducted after conventional cooling; normalizing is conducted; primary cold rolling is conducted; decarburization annealing is conducted; nitriding treatment is conducted; high-temperature annealing isolation agent coating is conducted, and a magnesium silicate bottom layer is removed; conventional high-temperature annealing isconducted; stretching, smoothening and annealing are conducted; organic waterborne alkyd resin insulating paint coating is conducted, and conventional drying is conducted. It is ensured that the finished product performance w